Long Stroke Speaker Magnetic Guiding Module Flux Concentration
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Solution Overview
Problem
Long stroke speakers in mobile communication devices face challenges with low magnetic utilization efficiency, leading to large and costly magnet modules that hinder miniaturization and increase space usage.
Innovation Solution
The design incorporates a shell with a vibrating system and a magnetic system, including a magnetic guiding module that enhances magnetic line concentration and density, allowing for a smaller magnet assembly while maintaining high power converting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the magnet modules are made large to ensure good power converting efficiency, then the power converting efficiency is improved, but the space occupied by the magnet modules increases and the cost increases
Solution Approach 1:
The magnetic guiding module creates a localized high-density magnetic field region precisely where the voice coil is positioned, concentrating magnetic flux in the critical interaction zone between the voice coil and magnet modules. This localized concentration of magnetic quality allows for reduced overall magnet size while maintaining sufficient magnetic field strength for efficient power conversion
Solution Approach 2:
The magnetic guiding module acts as an intermediary component between the magnet modules and the voice coil, shaping and directing magnetic flux lines to pass through the voice coil with higher density. This intermediary structure optimizes magnetic coupling efficiency, enabling smaller magnet modules to achieve the same effective magnetic interaction as larger magnets would provide without the guiding module
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration achieves high power converting efficiency with a more compact design, addressing the issue of miniaturization and cost by concentrating magnetic lines and reducing the space occupied by the magnet assembly.
Implementation Method 1
a voice coil (143) connected to the coil support (142)... the voice coil is disposed between the pair of magnet modules... converting electrical signals into audible sounds
Implementation Method 2
a magnetic guiding module that enhances magnetic line concentration and density, allowing for a smaller magnet assembly while maintaining high power converting efficiency
Data Source
AI summary
A long stroke speaker is provided in the present disclosure. The long stroke speaker includes a shell, a magnetic system, and a vibrating system. The magnetic system includes a magnet assembly and a magnetic guiding module cooperatively for forming a magnetic gap. The vibrating system includes a membrane, a coil support connected to the membrane, and a voice coil connected to the coil support. The magnet assembly includes a first magnet, a second magnet and a pole member, a magnetic direction of the first magnet and a magnetic direction of the second magnet are parallel to a vibration direction of the vibrating system, and an end of the first magnet adjacent to the pole member has a same polarity as an end of the second magnet adjacent to the pole member. The voice coil is arranged at the magnetic gap and surrounds the pole member.